Vannes Seasonal Pollution
Vannes usually records its highest OpenAQ-derived EPA AQI in January and its cleanest month in August. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Bretagne, France.
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Average EPA AQI
40
Rank 72 of 272 cities by average AQI
PM2.5
8.1
ug/m3 annualized city average
Seasonality
January
Cleanest: August
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Vannes
56
41
34
34
31
34
28
26
42
38
55
49
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Vannes, the current global analytics build covers 301 daily rows from 2024-01-02 to 2024-12-31. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.